Updated Grunt
Update Grunt favicon

* Updated to v.0.6.0
* Added aliases for `favicons` task.
* Generation of images with new version.
Updating `grunt-contrib-jshint` to v0.8.0
Add JSHint to the Grunt process.
Updating `grunt-contrib-copy` to v0.5.0
Back to specific devDependencies versions.
Merge pull request #34 from TheSeg/master

Updating Grunt devDependencies.